L87 6.2: “NHTSA to investigate potential for engine failure in nearly 1 million GM trucks, SUVs”

[nomech]

There are solutions to disable it. https://www.autostopeliminator.com/

Not bad, but there should be a way to disable in the settings or it should be an on/off button and not a momentary button. Meaning, you press the button to disable and as long as you have it in the disabled position, it never turns back on.

 

[SMITH2]

Happened to my wife a few days ago with our kids in the car. 2024 YukonXL Denali Ultimate. She had the same thing has everybody else: without warning it shutdown on the highway. Fortunately, no injuries or accidents caused by it. But it’s only a matter of time.

The dealership says the engine needs to be replaced. I’m trying to do some research on what this does to the value seeing as how the replacement will make it on the CarFax. Does anybody know? Also, will it alter the title?

The dealership has no timetable on when they’ll be able to do the replacement. We are going up there today to pick up our loaner (which, to me is not comparable) so just trying to get all my ducks in a row before we go up there. Thanks!

I have a 2023 Tahoe with only 21,000 miles and the same for me. We are 900 miles away from home pulling a camper and had to rent a truck to get to our distination. Now rent a truck to get back home. No idea if GM will cover the costs. It S--ks.

 

[Tomg737]

Supposedly, the service manager called GM today to start the buyback process. I’m sure this won’t be fun or quick.

 

[NoYukonYet_1Jeep]

I find it almost comical that this NHTSA investigation was published the day after it happened to me. Everyone on here who has had this problem should submit their experience to the NHTSA to help push the process along...

Report a Safety Problem | NHTSA

File a complaint with NHTSA if you experienced a vehicle, tire, car seat or equipment safety problem that could be a safety defect.

www.nhtsa.gov

Thank you for posting this. Feel free to check my whole feed from February 2023 but I went through this entire situation with a blown motor on my Yukon Denali. I have just submitted all my info to the NHTSA. Good luck to all impacted

 

[stevedonato]

It was only a matter of time. Spontaneous engine failure is a recipe for a serious incident. Fortunately, at least on this forum we haven't heard of anyone having a major incident outside of the inconvenience being stranded with a failed engine.

Toyota recently recalled the majority of their TT 3.5L V6 engines due to failure caused by machining debris eating up crank bearings.

Do you think "being stranded with a failed engine." is a trivial incovenience? WTF for a $60 - $80k vehicle!

 

[MattAlaska]

I'm being told indefinite wait on an engine, maybe 6 months. The dealer is suggesting I talk to them about trading it in for something else. Also that GM will only cover 1 week for a loaner? That's the part that is BS if it is true.

11,800 miles - needs new engine.

 

[nomech]

I'm being told indefinite wait on an engine, maybe 6 months. The dealer is suggesting I talk to them about trading it in for something else. Also that GM will only cover 1 week for a loaner? That's the part that is BS if it is true.

11,800 miles - needs new engine.

Nice, you have a vehicle with almost 12k miles, it needs a new engine and they want you trade it in for something else, making even more money off of you.

Bad engines and bad transmissions. I'm not sure that I want to look at GMs anymore.

 

[2024 White Tahoe]

I'm being told indefinite wait on an engine, maybe 6 months. The dealer is suggesting I talk to them about trading it in for something else. Also that GM will only cover 1 week for a loaner? That's the part that is BS if it is true.

11,800 miles - needs new engine.

Research your state’s vehicle lemon law. Most have a time limit to meet (typically 30 calendar days) for a vehicle to be out-of-service due to a defect, before it is considered a lemon.

Here is Alaska’s vehicle lemon law: https://law.alaska.gov/department/civil/consumer/lemonlaw.html

Do not talk to the dealer about the lemon law issue. Wait until you meet the requirement, then file the action yourself or hire an attorney.

The dealer is trying to avoid a lemon law repurchase by suggesting that you trade-in the vehicle. You will lose a lot by doing that.

Good luck.

 

[homesick]

I was so happy when I got my 22 with no start stop chip available. Such a terrible "feature" to eek out another 1mpg around town

This, and most vehicle complaints, are the result of efforts to meet ever-tightening, and often contradictory, regulations for fuel economy, pollution, noise, and safety; going back to the beginning of the 1970s.

These regulations are also the driving force in the rising vehicle costs; for purchase and for maintenance/repair.

And I'm not saying companies never screw up.

joe

 

[StephenPT]

Do you think "being stranded with a failed engine." is a trivial incovenience? WTF for a $60 - $80k vehicle!

I didn't say it's trivial. I said a major incident, which when it comes to auto manufacturers issuing a recall involves the potential for loss of "life and limb."

 

[Marky Dissod]

Pardon me for being redundant, but the last time I posted this was in another thread about failure-prone 6.2L V8s from last year.

Tyler Durden was explaining his former job as a 'recall coordinator' for a 'major automobile manufacturer to another passenger.
His job was to apply 'The Formula' - should we initiate a recall?:
"Take
the number of vehicles in the field - A
multiply by
the probable rate of failure - B
then multiply (A*B) by
the average out-of-court settlement - C

(A*B)*C = X

"If 'X' is less than the cost of a recall ... WE DON'T DO ONE."

Funny thing is, the schidty cylinder (valve) deactivation hardware isn't even the problem here!

 

[jfoj]

Funny thing is, the schidty cylinder (valve) deactivation hardware isn't even the problem here!

Well the AFM/DFM is likely a good part of these failures. Not sure what really changed as of 2021 other than moving from AFM to DFM. But understand the overall oiling system path of these engines SUX. What did the boys from the 60's learn in racing, oil the main bearings FIRST and the valvetrain LAST. The oiling path of these 6.2l engines send oil to the AFM manifold, camshaft and lifters first, then the main bearings are feed oil after the valvetrain. So the problem is the front main bearing and the #1 and #2 rod bearings are LAST in the oiling path. Add the 2 stage oil pump, 0W20 engine oil, Auto Stop/Start, high oil consumption and fuel contamination due to Direct Injection to an already compromised engine design, what do you expect. Add to this that the oil pressure sensor is located in the AFM manifold on the REAR of the engine, almost at the beginning of the oil flow path, how does the engine management system really know when the best time to switch the 2nd stage of the oil pump in? Also wondering if front main bearing problems are caused by oil starvation AND accessory drive belt tension on the crank snout? Every little thing can and does appear to add up. The stupid 2 stage oil pump and oiling path in the 6.2l is likely the death nail.

The real issue is what, if anything is GM going to do to completely resolve the problem? I suspect GM will issue a recall at some point with the flash update to the engine management system that will enable the 2nd state oil pump at a much earlier time, if not full time unless for some reason the DFM system would have a hard time with operating at a higher oil pressure.

At some point GM needs to understand almost all of these problems are oil system related.

Remember "It's the economy stupid", well for the later model GM V8 engines "It's the oiling system stupid!

Info on AFM - https://gm-techlink.com/wp-content/uploads/2018/09/GM_TechLink_16_Mid-August_2018.pdf

Bearing failure bulletin, notice main and thrust bearing mention - https://static.nhtsa.gov/odi/tsbs/2024/MC-10251909-0001.pdf

https://static.nhtsa.gov/odi/tsbs/2024/MC-10249946-0001.pdf

https://www.tiktok.com/video/7447674280717929774

This may be why the 5.3l is not as failure prone. Apparently the 5.3 does not have a 2 stage oil pump like the 6.2l. From this link - https://gm-techlink.com/wp-content/...ly-Tips-and-New-Information-February-2023.pdf

"Engine Oil Lubrication Description

We have seen numerous cases where OCV diagnosis and control has been attempted on engines that do not have oil control solenoids. Engine Lubrication Description Engine lubrication is supplied by a variable displacement single-stage (L82, L84) or two-stage (L87)vane-type oil pump assembly. An oil control solenoid valve, controlled by the engine control module (ECM), mounted to the two-stage oil pump provides dual stage functionality. The oil pump is mounted on the front of the engine block and driven directly by the crankshaft sprocket. The pump rotor and vanes rotate and draw oil from the oil pan sump through a pick-up screen and pipe. The oil is pressurized as it passes through the pump and is sent through the engine block lower oil gallery"

 

[PPK_]

Well the AFM/DFM is likely a good part of these failures. Not sure what really changed as of 2021 other than moving from AFM to DFM. But understand the overall oiling system path of these engines SUX. What did the boys from the 60's learn in racing, oil the main bearings FIRST and the valvetrain LAST. The oiling path of these 6.2l engines send oil to the AFM manifold, camshaft and lifters first, then the main bearings are feed oil after the valvetrain. So the problem is the front main bearing and the #1 and #2 rod bearings are LAST in the oiling path. Add the 2 stage oil pump, 0W20 engine oil, Auto Stop/Start, high oil consumption and fuel contamination due to Direct Injection to an already compromised engine design, what do you expect. Add to this that the oil pressure sensor is located in the AFM manifold on the REAR of the engine, almost at the beginning of the oil flow path, how does the engine management system really know when the best time to switch the 2nd stage of the oil pump in?

The real issue is what, if anything is GM going to do to completely resolve the problem? I suspect GM will issue a recall at some point with the flash update to the engine management system that will enable the 2nd state oil pump at a much earlier time, if not full time unless for some reason the DFM system would have a hard time with operating at a higher oil pressure.

At some point GM needs to understand almost all of these problems are oil system related.

Remember "It's the economy stupid", well for the later model GM V8 engines "It's the oiling system stupid!"

I don't know.. i think at least move to a 5w30 oil.. instead of the current spec. On top of this.. i think craftsmanship of the build is weaker.. somehow there is a more debris in engine earlier on. it is more than my 2018 engine.. i have a 2024 5.3 which i did first oil change at 1100 miles. i wish i did the first cycle at 100 miles.. at lot of debris in the change. i think... the smart thing is to 5w30, do 4k changes and get a warranty.

Anyway... you can see the magnet shows lot of metal in the filter. is this debris from the rockers needles? is from the lifters? is from other areas where clearances are not right? Not happy with motor.. though it not noisy with 1200 miles on it. i am going to warranty it 72/72. you don't have a choice.

 

[jfoj]

I did my first oil change at 500 miles, I still have the filter, have not cut it open yet. Will check and see what it looks like compared to your filter. I also am sending oil samples for analysis at each oil change to track possible future problems if I can detect anything unusual. I am also running magnets on the filter and a magnetic oil drain plug. My 2005 Yukon 6.0l came from the factory with a magnetic drain plug.

Fully agree with the 5W30 engine oil and 4000k oil change interval as well, more for oil staying in the bearing journals when the engine is shut down so you have a reduction of dry start up, but there clearly will be other benefits to include less problems with fuel dilution. HIGHLY recommend that you fill the sump to top of dipstick, 8.0 qts for an oil change is NOT enough. I am running 9 qts in my engine (flame suit on!) This put the oil level on the dipstick just slightly over the top hash mark. Check when engine is just turned off and you will see there is still oil in the top of the engine.

Almost wondering if it be worth a hack to command 2nd stage of oil pump on permanently for the 6.2l. It appears the 5.3l just has a variable displacement single stage oil pump, maybe this is why there are less 5.3l failures?? Assume this may cause a CEL and unclear if there would be other issues with the DFM system at the higher oil pressure? This L87 is brand new to me, so I have no real history or a full understanding yet of the oiling system and AFM craziness.

 

[CMoore711]

I'm being told indefinite wait on an engine, maybe 6 months. The dealer is suggesting I talk to them about trading it in for something else. Also that GM will only cover 1 week for a loaner? That's the part that is BS if it is true.

11,800 miles - needs new engine.

Loaner vehicles are owned and managed at each dealership level by the dealer their use is at their discretion. The "GM is only covering a loaner for 1 week" is BS from the dealer. Thats your dealership not willing to keep you in a loaner for extended periods of time until your vehicle is fixed.

You need to contact a local rental car company, get the daily rates for a Tahoe or Suburban (whatever size your GM SUV is that's needing the new engine) and tell the dealer that's the daily rental car cost you expect them to cover if they can't provide you a loaner for the time it takes to get your vehicle back. If your dealership is unwilling, then you need to start escalating your case with GM.

Or like I stated in post#6: Check the dealerships’ used vehicle inventory on the lot and ask for one of those. They got money in their used inventory, they own them, and it’s not like you’re asking for something brand new. Make them have some skin in the game and they’ll be more motivated to get your vehicle repaired and back to you sooner.

 

[jfoj]

GM Loaner and Courtesy Vehicle Information - https://static.nhtsa.gov/odi/tsbs/2024/MC-11010491-0001.pdf

 

[Pressureangle]

Apologies if this is being discussed elsewhere, I searched and checked the “is this being discussed elsewhere” suggestions.

Just saw this article, looks like a recall may be coming eventually.

This applies to the L87 6.2L V8 in 2021+ Tahoes/Yukons.

NHTSA to investigate potential for engine failure in nearly 1 million GM trucks, SUVs

Complaints lead NHTSA to examine certain Silverado, GMC Sierra, Chevrolet Tahoe, Suburban, GMC Yukon and Cadillac Escalade trucks and SUVs.

www.freep.com

I heard last fall from an inside source who overheard (meaningful pay grade/position persons) say, 'it doesn't really matter, we're going bankrupt again in 5 years'.

 

[MattAlaska]

Research your state’s vehicle lemon law. Most have a time limit to meet (typically 30 calendar days) for a vehicle to be out-of-service due to a defect, before it is considered a lemon.

Here is Alaska’s vehicle lemon law: https://law.alaska.gov/department/civil/consumer/lemonlaw.html

Do not talk to the dealer about the lemon law issue. Wait until you meet the requirement, then file the action yourself or hire an attorney.

The dealer is trying to avoid a lemon law repurchase by suggesting that you trade-in the vehicle. You will lose a lot by doing that.

Good luck.

According to my state's info, I am 2 months too late for lemon law.

 

[2024 White Tahoe]

According to my state's info, I am 2 months too late for lemon law.

Sorry - that’s a bummer!

 

[PPK_]

I did my first oil change at 500 miles, I still have the filter, have not cut it open yet. Will check and see what it looks like compared to your filter. I also am sending oil samples for analysis at each oil change to track possible future problems if I can detect anything unusual. I am also running magnets on the filter and a magnetic oil drain plug. My 2005 Yukon 6.0l came from the factory with a magnetic drain plug.

Fully agree with the 5W30 engine oil and 4000k oil change interval as well, more for oil staying in the bearing journals when the engine is shut down so you have a reduction of dry start up, but there clearly will be other benefits to include less problems with fuel dilution. HIGHLY recommend that you fill the sump to top of dipstick, 8.0 qts for an oil change is NOT enough. I am running 9 qts in my engine (flame suit on!) This put the oil level on the dipstick just slightly over the top hash mark. Check when engine is just turned off and you will see there is still oil in the top of the engine.

Almost wondering if it be worth a hack to command 2nd stage of oil pump on permanently for the 6.2l. It appears the 5.3l just has a variable displacement single stage oil pump, maybe this is why there are less 5.3l failures?? Assume this may cause a CEL and unclear if there would be other issues with the DFM system at the higher oil pressure? This L87 is brand new to me, so I have no real history or a full understanding yet of the oiling system and AFM craziness.

Below is first oil change from ‘24 5.3… iron and aluminum in the bottom of my drain bucket… if you at it you can see it.. i think drain - a couple anyway before 1500 miles.

I still am thinking a drop in cleaning or suppliers.. of the rocker or lifters.. there is just no way you want to run that oil for 7500 miles.. yikes!! There is a lot of boring and tapping going on.. to build the block. It might be cleaning is less..